Curtailing wheel-through transactions to prevent a nuclear shutdown - Revised IMDC and Q&A
May 12, 2016
The IESO conducted a stakeholder webinar on April 28 to review and discuss proposed changes to Market Manual 7.2: Near-Term Assessments and Reports. The proposed change would add a condition in section 1.3.4: IESO Control Actions (Nuclear Manoeuvres Forecasted or Occurring) regarding the curtailment of wheel-through transactions if a nuclear shutdown is scheduled in future hours concurrent with wheel-through transactions. The IESO posted an Interim Market Document Change (IMDC-31) on April 28 and received feedback from several stakeholders with concerns and questions about the proposed change.
As a result of the feedback received during the webinar, as well as through the stakeholder comment process for the IMDC, the IESO has revised the IMDC and will post it for another five-day comment period at Pending Changes - Documents. The revised IMDC clarifies and emphasizes the rationale that the IESO will curtail linked wheel-through transactions for reliability. The IESO has also developed a Q&A document to address stakeholder feedback.